Kode/Lambang (Simbol) Rele Proteksi Sesuai Standar ANSI dan IEC

Ada banyak peralatan proteksi yang ada pada bay penghantar maupun bay trafo. Masing – masing peralatan proteksi tersebut dalam rangkaian satu garis digambarkan dalam bentuk lambang / kode.  Berikut adalah Kode da lambang rele Proteksi berdasarkan standar ANSI C37-2 dan IEC 60617:

Nama Relay	Kode ANSI	Lambang IEC
Over Speed Relay	12
Under Speed Relay	14
Distance Relay	21
Over Temperature Relay	26
Under Voltage Relay	27
Over voltage Relay	59
Directional Overpower Relay	32
Negative Sequence Relay	46
Negative Sequence Voltage Relay	47
Thermal Relay	49
Instantaneous Overcurrent Relay	50
Inverse TimeOvercurrent Relay	51
Inverse Time Earth Fault Overcurrent Relay	50G
Definite Time Earth Fault Overcurrent Relay	51N
Voltage Restrained/controlled Overcurrent Relay	51V
Power Factor Relay	55
Neutral Point Displacement relay	59
Earth fault Relay	64
Directional Overcurrent Relay	67
Directional EarthFault Relay	67N
Phase Angle Relay	78
Autoreclose Relay	79
Underfrequency Relay	81U
Overfrequency relay	81O
Differential Relay	87